Hot air balloon



FIG. 1 is a perspective view of the hot air balloon made in accordance with the present invention;

FIG. 2 is an elevation view, front or back thereof;

FIG. 3 is a side elevation view, left or right thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a hot air balloon, as shown and described. 